Visitors to the Beach Club at Dolphinaris watched trainers work with the dolphins this week, although the larger facility — Dolphinaris Arizona — temporarily shuttered Feb. 8 as a team of experts investigates after a fourth dolphin's death.

The four remaining bottlenose dolphins, some who were swimming in the pools and catching rings and other toys from the trainers this week, are expected to be moved to new facilities sometime in the next 30 days.

"We don't give the exact date and time for the safety of the dolphins," Dolphinaris spokeswoman Jen Smith said.

Two of the four remaining dolphins which are on loan from Dolphin Quest, will return to that facility in Hawaii. The other two dolphins will move to another licensed facility in the U.S. while Dolphinaris Arizona is evaluated.

Currently, 66 facilities in the country have dolphins used for public display, according to a database from the National Oceanic and Atmospheric Administration.

Typically during transports, the dolphins are placed in a sling or stretcher and suspended in water, and the entire container is loaded onto an airplane for long-distance moves.

Three of the remaining dolphins at the Arizona venue have been moved twice before, while it's the second move for one of the dolphins, according to the NOAA database, which tracks the movement of captive dolphins in the U.S.

The Arizona Republic turned to experts to talk about the toll such moves have on dolphins.

Transporting dolphins

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Smith, the Dolphinaris Arizona spokeswoman, said the facility will let the public know when the dolphins have arrived at their new homes — but won't release details ahead of the move for the dolphins' sake.

"It requires extensive planning and care on both ends and needs to be calm and free of the stress and distraction that onlookers could cause," she said.

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Construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. People will get to swim with the dolphins at Dolphinaris Arizona. It is expected to open in September of 2016. David Wallace / The Republic

Pools during construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. The facility will be home to eight to 12 bottlenose dolphins upon opening, according to General Manager Grey Stafford . David Wallace / The Republic

Pools during construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. The The dolphins will live in a network of indoor and outdoor pools that will hold about 1 million gallons of water, General Manager Grey Stafford said. David Wallace / The Republic

Pools during construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. People will get to swim with the dolphins at Dolphinaris Arizona. It is expected to open in September of 2016. David Wallace / The Republic

Pools during construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. How much will swimming with the dolphins cost? Pricing has not been announced, but prices for the five Mexico "dolphinariums" range from $119 for an hour-long "swim and ride" to $159 for a four-hour program. David Wallace / The Republic

Construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. The dolphins, which will live in a network of indoor and outdoor pools, will be trained with rewards including toys, play, water jets and touch, according to the company. David Wallace / The Republic

Construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. People will get to swim with the dolphins at Dolphinaris Arizona. It is expected to open in September of 2016. David Wallace / The Republic

Construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. People will get to swim with the dolphins at Dolphinaris Arizona. It is expected to open in September of 2016. David Wallace / The Republic

Dr. Grey Stafford, general manager of Dolphinaris Arizona, looks on during construction of the Dolphinaris Arizona facility on the Salt River Pima Indian Community on Thursday, May 19, 2016. People will get to swim with the dolphins at Dolphinaris Arizona. It is expected to open in September of 2016. David Wallace / The Republic

New social circles good for dolphins?

Dolphins do not live in family groups like humans, according to Kathleen Dudzinski, a marine mammal scientist with the Dolphin Communication Project in Florida. Instead, they reside in smaller subgroups of dolphins throughout their lifetime that they play, socialize or travel with.

"Most of the facilities I’m familiar with take into consideration the social dynamics within the groups they manage when coordinating for transfers between facilities," Dudzinski said.

Bruck said that leaving dolphins too long in undesirable social situations can also be harmful to the animals, such as when a male dolphin stays too long with its mother.

"With dolphins, sometimes mom needs to kick that male out of the house, he’s gotta go to college," Bruck said. "If he’s sticking around in a situation like that for too long, there's actually a greater physiological concern."